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Shareholders' Equity and Noncontrolling Interest - Noncontrolling Interest (Details) - shares | May 04, 2017 | Sep. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016
--- | --- | --- | --- | ---
Noncontrolling Interest [Line Items] |  |  |  |
Ownership interest of non-controlling interest |  | 6.90% | 7.60% |
Common Stock Class C |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |
Common stock, shares outstanding (shares) |  | 19,155,921 |  | 19,155,921
Common Stock Class A |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |
Common stock, shares outstanding (shares) |  | 256,670,839 |  | 200,835,049
Subscription Agreements | Common Stock Class A |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |
Shares issued in transaction (in shares) | 23,500,000 |  |  |

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- Definition Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21463-112644 + Details
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